When I select NULL as the value and click update, it shows that the update is successful, but when I refresh it changes back to add-avatar. It seems that all fields cannot be changed to null.
TL;DR
Developers are experiencing a database error where selecting NULL as a value and updating appears successful but reverts back to 'add-avatar' upon refresh. This issue indicates that all fields cannot be changed to null. A possible solution could be to check for any constraints that prevent null values from being accepted in the database.